Press for veneers or other articles



2 Sheets-Sheet 1.

(No Model.)

J. J. HAYES. PRESS F011 VENEERS 0R OTHER ARTICLES. No. 516,012.

' Patented Mar. 6, 1894.

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2 Sheets-Sheet 2.

(No man.) J. J. HAYES.

PRESS FOR VENEBRS OROTHBR ARTICLES.

. Patented Mar. 6, 1894.

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' UNITED STATES PATENT JOHN J. HAYES, OF FLUSHIN G, ASSIGNOR TO THE JOHNJ. HAYES MACHINE COMPANY, OF BROOKLYN, NEW YORK.

PRESS FOR VENEERS OR OTHER ARTICLES.

SPECIFICATION forming part of Letters Patent No. 516,012, dated March 6,1894.

Application filed March 10, 18931 To @ZZ whom t may concern:

Be it known that l, JOHN J. HAYES, a citil zen of the United States,residing at Flushing, 1n the county of Queens and State of New York,have invented an Improvement in Presses forVeneers or other Articles, ofwhich the following is a specication.

Presses have been made for the reception of veneers, rubber belts andother articles in which the follower and platen have been heated foracting upon the material that is pressed and curing or drying the same;but wlth veneers especially it is desirable only to expose them to aregular amount of pressure to prevent the risk of injury, and inconsequence a greater or less number of veneers being inserted betweenthe respective parts of the press, it has been usualto employ hydraulicpressure that allowed the followers to remain at a greater or lessdistance apart according to the thickness of the veneers introduced.

In my present improvements I dispense 'with the heavy and cumbersomedevices employed in hydraulic presses and actuate the follower by togglemechanism, and I provide yielding supports for the head block andadjustable mechanism for the same, whereby nearly uniform pressure canbe given upon the veneers or other articles under the ordinaryvariations connected with the introduction of veneers into such press;and I provide one or more tables between the follower andthe head block,which are heated, so that the veneers are dried with rapidity and whilein a straight condition and under pressure sufficient to prevent thewarping or bending of such veneers.

In the drawings, Figure l is a general plan view of the apparatus. Fig.2 is an elevation of the same. Fig. 3 is a vertical cross section nearthe line :n and Fig. Il is a detached sectional view of one set ofsprings.

The bed plate A is of suitable size and strength and upon it are thecolumns or rie bars B that pass vertically through the end portions ofthe follower O, the table D and head block E; and these parts can beraised or lowered and in so doing they slide upon the columns B. Theflanges 2 upon the under side of the follower O strengthen Serial No.465,334. (No model.)

the same, and to these iianges are connected theupper ends of the togglebars F F', and the lower bars G G ofthe toggles are connected at theirlower ends to bearings 3 on the bed plate A. It is advantageous toconstruct the parts with the upper ends of the toggle bars F E betweenthe pairs of tlanges 2 and to insert the lower ends of the toggle bars GG between the pairs of vertical lugs forming the bearings 3 and to unitethe toggle bars by knuckle joints through which the pins Ltpass. Thepairs of toggle bars F F', G G act vertically to raise the follower C,and there are horizontally acting toggle bars that give motion to theaforesaid pairs of toggle bars F E', G G', and these horizontal togglobars are composed of links H H extending from the pins e to the pins 5and to links l I', which links I I' are brought together atthe pin 6which passes through a central support K upon the bed plate A, and thereare links L L', hanging from the pins 5 and eX- tendng to the cranks N Nupon the horizontal shafts O O', and these shafts O O' are connectedtogether by the gear wheels P P thatV are rotated by competent power,preferably by the pinion Q upon the shaft R that is supported inbearings S and driven by a belt to the pulley T.

It will now be understood that when the toggles and cranks are in thepositions indicated by dotted lines, the follower O is lowered so thatthe space between the follower and the head block is increased and theveneers or other articles to be pressed can be introduced into position,and when the pulley T is rotated, the toggles are gradually moved untilthey assume the horizontal and vertical positions represented in fulllines, and at this point the rotation of the parts is snspended untilthe necessary time has elapsed for effecting the drying ot the veneersor the curing or drying of other articles, and when in this position thethrust of the respective parts is so balanced that there is no tendencyfor the parts to become displaced when the power is disconnected, thatis to say, the vertical toggles F F', G G are in line and perpendicular,and the links H Il', I I are horizontal and in line with each other andreliably hold the vertical toggles in their posi- IOO tions, and thecranks N N are at or near their lowest positions and hence are notliable to move by the weight of the parts. This arrangement of togglemechanism is therefore very convenient and reliable for actuating thepress.

It is advantageous to apply collars 7 arou nd the columns B forsupporting the head block E and regulating the position to which it maydescend. when the pressure is relieved and the table D is provided withsuspending chains or ropes U passing over pulleys 8 to the drum 9 uponthe shaft 10, and upon this shaft 10 is a pulley or grooved wheel V fromwhich the weight lV is suspended by a cord or rope 11, hence this weightW tends to rotate the shaft 10 and draw up the tableD through the actionof the ropes U, and when the weight W is raised, the table D can beeasily drawn down. It is preferable to so proportion the Weight W to thetable that the table can be easily moved up or down by hand. I haverepresented the shaft 10 as supported in bearings upon the head block E.

As a resistance to the head block when pressure is applied by thetoggles, I make use of springs 'Y between the upper surface of the headblock and the end platesZ Z which have holes through which the columns Bpass, and the upper ends of these columns are screw-threaded and thereare beveled gear wheels 12 the hubs of which form nuts to the screwsupon the columns B, and these beveled gear wheels are rotated in eitherone direction or the other by the hand wheel 13, shaft 14 and wormpinions 15 acting upon the worm wheels 16 upon the cross shafts 17 inbearings 19 which have bevel pinions 18 at their ends gearing into thebeveled wheels 12 of the aforesaid nuts; and it is to be understood thatthe screw threads upon the columns and in the nuts are to be rightandleft handed, so that by rotating the hand wheel 13 the respectivebeveled gear wheels and nuts will be raised or lowered bodily, and thebearings 29 upon the end plates Z Z support the shaft 14 and the endplates Z Z rise and fall with the beveled gear wheels and nuts l2, thesprings Y lifting such end plates.

It is advantageous to make use of helical springs, one within the otherin groups, as represented, so that the necessary elasticity may beobtained, and by employing a greater or less number of springs in eachgroup, so the strength of each group of springs may be varied asrequired, and by setting the springs down more or less, so the pressureexerted upon the veneers or other articles can be varied, the springsyielding to inequalities in. the thickness of the articles acted upon.In instances where the springs have been applied around the screwsTthreaded columns and Ibetween the head blocks and the nuts, it has beennecessary to disconnect the nuts for changing the springs to vary thepressure of the springs upon the head block.

By my present improvements the springs are introduced between the headblock and the end plates, so that they can-be changed or increased orlessened in number to vary the pressure applied to the head block, bysimply slackening the nuts or the collars suffciently for slipping outone set of springs and introducing another, or for increasing orlessening the number of the springs made use of as a resistance forpressing the veneers or similar articles. This is a great convenience,as the pressure often has to be varied according to the character of thematerial acted upon.

The follower C, table D and head block E are represented in Fig. 3 ashollow so as to be adapted to the reception of steam or other iuid atthe required temperature for heating up the follower, table aud headblock to the desired extent for acting upon the material that is beingpressed. These parts may be constructed in any desired manner andsupplied with steam or other iiuid by flexible pipes or otherwise asheretofore usual in presses.

I claim as my invention- 1. The combination in a press with the followerand bed plate, of the pairs of toggle blocks between the bed plate andthe follower, horizontal toggle bars between the vertical toggle bars, acentral support for such horizontal toggle bars, cranks and connectingrods between the cranks and the centers of the horizontal pairs oftoggle bars and gear wheels for connecting the shafts of the cranks, andmechanism for revolving such gear wheels, substantially as set forth.

2. rPhe combination with the bed plate in a press having upwardlyprojecting lugs, of a follower' having flanges upon the under side,toggle links connected at their upper ends to the iianges of thefollower and at their lower ends to the bearing lugs on the bed plate, acentral support upon the bed plate, horizontal toggle links in pairsextending from the central joints of the vertical toggles, crank armsand their shafts supported on the bed plate, links between the cranksand the center joints of the horizontal toggles, and gear wheelsconnecting the respect- IOO IIO

ive shafts, and a pinion for driving such gear wheels, substantially asset forth.

3. In a press for veneers and other articles, the combination with thefollower and screw threaded columns and head block, of nuts upon suchcolumns, end plates through which the columns pass and against which thenuts act, movable springs introduced between projections on the oppositesurfaces of the end plates and the head block and gearing carried by theend plates and acting upon the nuts and by which such' nuts can berotated simultaneously in one direction or the other, and the springscan be introduced or removed without taking off t-he nuts, substantiallyas set forth.

4. The combination in a press, of a follower, mechanism for moving thesame, a bed the table, whereby the ends of the table are Io moved withuniformity by the action of one Weight, substantially as set forth.

Signed by me this 3d day of March, 1893.

JOHN J. HAYES.

Witnesses:

GEO. T. PINGKNEY, WILLIAM G. Moni.

